Draft-rigging.



PATENTED JULY 7, 1903.-

` N0.733,o94. s

'W. THORNBURGH. `DRAFT RIGGING. PPLIOATION- rlLxflDzMAB. 4, 1903.

` 2 SHEETS-SHEET 2.

III.

no MODEL .Inl v l uw l w1 LLlAM TORNBURGH am wwwa n ne plates G and H.

WILLIAM TI-IORNB URGH,

Patented .Tuly 7, 19033.'

y PATENT OEEICE."

or DETROIT, MICHIGAN. y

DRAFT-RIGGING.

SPECIFICATION forming part of Letters Patent No. 733,094, dated July 7, 1903.

Application filed March 4. 1903.

provements in draft-rigging; and it consists` in the construction of friction-plates which are rotated in opposite directions in contact, and, further, in the peculiar construction, arrangement, and combination of the various parts, as more fully hereinafter described.

In the drawings, Figure 1 is a vertical central section through -a draft-rigging embodying my invention. Fig. 2 is a horizontal section centrally through Fig. l. Fig. is a vertical section on lineX X of Fig. 2; and Fig. 4L is a sectional perspective illustrating the construction of the housing and the follower, the housing in this figure being made in two side sections, being slightly modified from construction shown in the other figures.

A represents the usual draft-timbers of a railway-car, to which the side plates B are attached in the usual manner-as, for instance,

by the bolt C. W'ithin these side plates is a housing for the spring and follower-plates. In Figs. 1, 2, and 3 Ishow this housing in the shape of a cylinder D, being formed in two separated sections meeting at ythe point E. In Fig. 4I show the housing as made up of four sections, divided at the same middle point E and divided also longitudinally. This slight difference in detail does not in any way affect the broad features of my invention. The sections of the housing I preferably connect by `an interlocking j oint at the point F., as will plainly appear by Figs. 2 and 4. Within the housing is a spring or springs F. In this case I show two springs, one within the other. Within the housing also and in this instance at each end of the housing are the follower-a The followerplate G has upon it suitable lugs I, which engage in spiral grooves J upon opposite sides of the housing.

Serial No. 146.210. (No model.)

The followenplate II has lugs K engaging in the spiral grooves L in the housing. The spiral grooves .I andL are inclined in opposite directions, so that ifthe follower-plates G and H are moved longitudinally they will be ro tated in opposite directions.

M represents the end blocks outside the outer follower-plates and with which the usual yoke O (to which is connected the draftbar P) engages.

The parts being thus constructed, their op 4 `eration is as follows: If the draw-bar P is moved to the left, it will compress the springs F, and the right-hand folloWer-plates and the end block M will have moved to the left, and during such movement follower-plates Gand II will be rotated in opposite directions in contact, the plates being held in contact by the springs. The result will be that there will be a frictional resistance due to this opposite rotational movement of the two plates upon each other and also of the rotational `movement of the plate G upon the end block M. In this manner I am able with the simple construction of draft-,rigging to obtain a great frictional resistance, together with the resistance of the spring, to the movement of the draw-bar in either direction.V

What I claim as my invention isl.A In a draft-rigging, contactingfollowerplates, and means for rotating said plates in opposite directions upon the movement of the draw-bar.

2. Ina draft-rigging, the combination of the draw-bar and yoke, the sideplates, the springs, of contacting followerfV plates, and means for rotating the contacting plates in opposite directions upon longitudinal 1novement of the draw-bar.

3. In a draft-rigginggfthe ,combination of the draw-bar yoke and side plates, a housing Within the side plates, the `spring Within the housing, a pair of contacting follower-plates, opposite-inclined ways on the interior of the housing with which bearings on the plates engage, whereby upon endwise movement of the draw-bar, the spring is compressed` and the follower-plates are rotated in opposite directions in contact.

4:. In a draft-rigging, a combination of the side plates, the housing Within the side plates,

divided transversely into sections, the opposite-inclined Ways in the housing, the pairs of follower-plates at the end of the housing, the end block, the spring Within the housing and against which the follower-plates bear, the yoke and the draw-bar, the parts operating substantially .as and for the purposes described.

In testimony whereof I affix my signature in presence of tWo witnesses. A

WILLIAM TIIORNBURGH. Witnesses:

G; U. LATOUR, H. C. SMITH. 

